Influence of Different Mineral Precursors on the Properties of Fly Ash Based Alkali-Activated Mortars

Abstract:

Alkali-activated materials based on fly ash are widely developed and also produced on the present. Some of fly ashes are not suitable for production of alkali-activated materials because of their inconvenient chemical composition. Alumina-silicates are the most important components that are needed to accomplish the successful reaction. The proper content of amorphous phase of alumina-silicates and its proportion as well should be provided for the final composition of alkali-activated materials. The influence of pure aluminum oxide powder as well as raw milled natural perlite on mechanical properties and durability of alkali-activated mortars was investigated. These minerals were used as partial replacement of fly ash coming from black coal combustion. In addition, the mortars were prepared by using different alkali activators.

• Periodical: Key Engineering Materials (Volume 761)
• Pages: 73-78
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.761.73
• Online since: January 2018
• Authors: Matej Špak*, Pavel Raschman
• Keywords: Alkali Activated Mortars, Fly Ash, Mineral Precursors

References

[1] M. Špak, I. Halaša, M. Šuster, O. Vojtechovský, Informácie o používaní popolčeka do betónu, Trnava: BetónRacio. (2012).

[2] A. Fernández-Jiménez, A. Palomo, Characterisation of the fly ashes. Potential reactivity as alkaline cements, Fuel. 82 (2003) 2259-2265.

DOI: 10.1016/s0016-2361(03)00194-7

[3] J.L. Provis, A. Palomo, C. Shi, Advances in understanding alkali-activated materials Cement Concrete Res. 78 (2015) 110–125.

DOI: 10.1016/j.cemconres.2015.04.013

[4] P. Duxson, A. Fernández-Jiménez, J.L. Provis, G.C. Lukey, A. Palomo, J.S.J. Van Deventer, Geopolymer technology: the current state of the art, J. Mater. Sci. 42 (2007) 2917–2933.

DOI: 10.1007/s10853-006-0637-z

[5] D. Bondar, C.J. Lynsdale., N.B. Milestone, N. Hassani, A.A. Ramezanianpour, Effect of type, form, and dosage of activators on strength of alkali-activated natural pozzolans, Cement Concrete Comp. 33 (2011) 251-260.

DOI: 10.1016/j.cemconcomp.2010.10.021

[6] A. Palomo, M.W. Grutzeck, M.T. Blanco, Alkali-activated fly ashes. A cement for the future. Cement Concrete Res. 29 (1999) 1323-1329.

DOI: 10.1016/s0008-8846(98)00243-9

[7] A. Buchwald, M. Weil, K. Dombrowski, Evaluation of primary and secondary materials under technical, ecological and economical aspects for the use as rew materials in geopolymeric binders, in: Proceedings of the 2nd Int. Symposium of Non-Traditional Cement and Concrete, (2005).

[8] A.M. Rashad, A synopsis about perlite as building material – A best practice guide for Civil Engineer, Constr Build Mater. 121 (2016) 338–353.

DOI: 10.1016/j.conbuildmat.2016.06.001

[9] Y. Luo, S. Ma, C. Liu, Z. Zhao, S. Zheng, X. Wang, Effect of particle size and alkali activation on coal fly ash and their role in sintered ceramic tiles, J Eur Ceram Soc. 37 (2017) 1847–1856.

DOI: 10.1016/j.jeurceramsoc.2016.11.032

[10] Y. Ding, J.G. Dai, C.J. Shi, Mechanical properties of alkali-activated concrete: A state-of-the-art review, Construction and Building Materials. 127 (2016) 68–79.

DOI: 10.1016/j.conbuildmat.2016.09.121

[11] N.K. Lee, K.T. Koh, G.H. An, G.S. Ryu, Influence of binder composition on the gel structure in alkali activated fly ash/slag pastes exposed to elevated temperatures, Ceram Int. 43 (2017) 2471–2480.

DOI: 10.1016/j.ceramint.2016.11.042

[12] G. Bumanis, L. Vitola, D. Bajare, L. Dembovska, I. Pundiene, Impact of reactive SiO2/Al2O3 ratio in precursor on durability of porous alkali activated materials, Ceram Int. 43 (2017) 5471–5477.

DOI: 10.1016/j.ceramint.2017.01.060